Mechani-Kong first appeared in Toho's 1967 film King Kong Escapes, where the mad scientist Dr. Who builds a robotic double of King Kong to mine a radioactive element. The character was designed as a cold, mechanical mirror of the ape, and its roar became part of that contrast, sounding engineered rather than alive. Kaiju fans kept the character alive through retrospectives, clips and soundboards, and editors now reuse the roar whenever they need a monster sound that also reads as a machine.